title: Induced chromosome loss following treatment of postmeiotic cells of the Drosophila melanogaster male with MMS and DMN and matings with repair-proficient females and the repair-deficient females mei-9a and st mus302.
abstract: Drosophila melanogaster ring-X males carrying a double marked Y chromosome, BsYy+, were treated with MMS or DMN and mated with repair-proficient females or the repair-deficient females mei-9a and st. mus302. Frequencies of induced complete loss (principally the ring-X) and partial losses of the Y chromosome (loss of Bs or Y+) decreased in the sequence st must302 greater than mei-9a greater than repair-proficient females agreeing with the sequence obtained previously with procarbazine and DEN. With MMS and DMN, some 30-40% or more or partial Y chromosome losses are mosaics from mei-9a and only 0.4% from st mus302 females and a delay in mei-9a females. Similar findings with procarbazine and DEN are indicated. That the higher sensitivity of st mus302 relative to mei-9a results from impairments in both postreplication and excision repair in the former remains to be determined.
mesh_terms: D000782:Aneuploidy; D000818:Animals; D002453:Cell Cycle; D004247:DNA / Q000378:metabolism; D004260:DNA Repair; D004128:Dimethylnitrosamine / Q000494:pharmacology*; D004331:Drosophila melanogaster / Q000187:drug effects* / Q000235:genetics; D005260:Female; D008297:Male; D008741:Methyl Methanesulfonate / Q000494:pharmacology*; D012730:Sex Chromosomes / Q000187:drug effects*
chemical_list: D004247:DNA; D008741:Methyl Methanesulfonate; D004128:Dimethylnitrosamine